"We cannot simply drill our way to energy security," Fox wrote. "Americans are demanding a clean energy future that goes beyond drilling and incentivizes the technologies that are critical to building a 21st-century clean energy economy. What we need now is presidential leadership that drives comprehensive clean energy and climate legislation that caps harmful carbon pollution, puts America back to work, ends our reliance on foreign oil and keeps us safe."

The statement went largely unnoticed, but as The Hill's Russell Berman reports, Gore's embrace of Fox's comments represents the former vice president's first major break with the Obama administration.